Sign into your Shopify admin. Navigate to 'Online Store' and select 'Themes.' Click 'Customize' for your active theme. In the left-hand menu, choose 'Sections.' Click 'Add Section' or 'Add Content' and locate 'FAQ' or 'Accordion.' Add frequently asked questions and their answers. Customize the design and style of the FAQ section. Save or publish your changes, and the FAQ section will be added to your Shopify store.